Why do we prepare cash flow to the draft report of what? What are the ingredients required to prepare this report?

We prepare a  cash flow to show the cash we are going to receive and how we are going to use that cash. We ascertain how liquid our firm is. We use reports like the sales report for cash inflows and expenditure/expenses report for cash outflows to come up the cash flow to the draft report. 

we make cash flow to know or to see where does the money go for used for.